package com.thinkcms.core.utils;

import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class HttpContextUtils {
	public static HttpServletRequest getHttpServletRequest() {
		return ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
	}



	// \b 是单词边界(连着的两个(字母字符 与 非字母字符) 之间的逻辑上的间隔),
	// 字符串在编译时会被转码一次,所以是 "\\b"
	// \B 是单词内部逻辑间隔(连着的两个字母字符之间的逻辑上的间隔)
	static String phoneReg = "\\b(ip(hone|od)|android|opera m(ob|in)i"
			+"|windows (phone|ce)|blackberry"
			+"|s(ymbian|eries60|amsung)|p(laybook|alm|rofile/midp"
			+"|laystation portable)|nokia|fennec|htc[-_]"
			+"|mobile|up.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";
	static String tableReg = "\\b(ipad|tablet|(Nexus 7)|up.browser"
			+"|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";

	//移动设备正则匹配：手机端、平板
	static Pattern phonePat = Pattern.compile(phoneReg, Pattern.CASE_INSENSITIVE);
	static Pattern tablePat = Pattern.compile(tableReg, Pattern.CASE_INSENSITIVE);




	/**
	 * 检测是否是移动设备访问
	 * @Title: check
	 * @param userAgent 浏览器标识
	 * @return true:移动设备接入，false:pc端接入
	 */
	public static boolean check(String userAgent){
		if(null == userAgent){
			userAgent = "";
		}
		// 匹配
		Matcher matcherPhone = phonePat.matcher(userAgent);
		Matcher matcherTable = tablePat.matcher(userAgent);
		if(matcherPhone.find() || matcherTable.find()){
			return true;
		} else {
			return false;
		}
	}

	public static boolean ckIsMobile(){
		boolean mobile=false;
		HttpServletRequest request=getHttpServletRequest();
		if(Checker.BeNotNull(request)){
			String userAgent = request.getHeader("User-Agent");
			if(Checker.BeNotBlank(userAgent)){
				mobile=check(userAgent);
			}
		}
		return mobile;
	}
}
